Please refer to the attached sample project and follow the steps in the gif file.
Workaround: custom filtering to control which rows to be visible or not: https://docs.telerik.com/devtools/winforms/controls/gridview/filtering/custom-filtering
private void radGridView1_CustomFiltering(object sender, GridViewCustomFilteringEventArgs e)
{
e.Handled = true;
e.Visible = e.Row.Cells["Value"].Value.Equals( Double.NaN);
}